MAX17553

PRODUCTION

4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converter

60V, Low IQ Synchronous Buck Regulator Enables High Efficiency

Data Sheet (Rev. 1)
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Overview

  • Reduces External Components and Total Cost
    • No Schottky–Synchronous Operation
    • Internal Control Loop Compensation
    • Internal Fixed Soft-Start
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • ​Reduces Number of DC-DC Regulators to Stock
    • Wide 4V to 60V Input Voltage Range
    • Adjustable Output Range from 0.8V up to 90% of VIN (MAX17553C)
    • Delivers Up to 50mA Load Current
    • 150kHz to 1.5MHz Adjustable Switching Frequency
  • Reduces Power Dissipation
    • 91.5% Full Load Efficiency (VIN = 24V, VOUT = 5V)
    • Higher Light-Load Efficiency with Discontinuous-Conduction Mode (DCM) Operation
    • Power Loss Reduction with External Boot-Strap Input (FB/VO) for Internal Circuitry (MAX17553A and MAX17553B only)
    • 3.8μA Shutdown Current
  • Flexible Design
    • Programmable EN/UV and HYST Threshold
    • Open-Drain Output Active-Low RESET for Output Status Monitoring
  • Robust Operation
    • Built-in Hiccup Mode Overload Protection
    • Overtemperature Protection
    • CISPR32 Class B Compliant
    • Wide -40°C to +125°C Ambient Operating Temperature, -40°C to +150°C Junction Temperature
MAX17553
4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converter
MAX17553: Simplified Application Diagram
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Documentation

Data Sheet 1

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • MAX17553A
  • MAX17553B
  • MAX17553C

ADI Power Studio™ Designer

ADI Power Studio™ Designer is the next-generation tool for IC-level, power supply design, guiding engineers to faster, validated solutions.

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SIMPLIS Models 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
MAX17553CEVKIT

Evaluation Kit for the MAX17553 (MAX17553C)

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Features and Benefits

  • 14V to 60V Input-Voltage Range for the Step-Down Converter
  • 12V Output Voltage, Up To 50mA Continuous Load Current
  • 95% Peak Efficiency
  • Minimum Number of External Components
  • 400kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage (EN/UV) and Hysteresis (HYST)
  • Internal Loop Compensation
  • 3.2ms (typ) Internal Soft-Start Time
  • Open-Drain Active-Low RESET Output to Monitor Output Voltage
  • Hiccup-mode Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17553C evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17553C, a 4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 14V to 60V input and provides a 12V, 50mA output. The EV kit is set up to turn ON at 20V(max) and turn OFF at 14V(max) using EN/UV and HYST pins. The step-down converter is programmed to switch at a 400kHz frequency and delivers a peak efficiency of 95% with supplied components.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17553C features programmable input EN/UV and HYST threshold, programmable frequency, and an open-drain active-low RESET signal. The device offers built-in hiccup mode protection for over-load and short circuit conditions, and thermal shutdown. The EV kit is complaint with CISPR32 class B standard.

Applications

  • Factory Automation
  • Aftermarket Market Automotive
  • General Point of Load

eval board
schematic 2
MAX17553BEVKIT

Evaluation Kit for the MAX17553 (MAX17553B)

Buy Now View Details

Features and Benefits

  • 6V to 60V Input-Voltage Range for the Step-DownConverter
  • 5V Output Voltage, Up To 50mA Continuous LoadCurrent
  • 93.6% Peak Efficiency
  • Minimal Number of External Components
  • 200kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage(EN/UV) and Hysteresis (HYST)
  • Internal Loop Compensation
  • 3.2ms (typ) Internal Soft-Start Time
  • Open-Drain Active-Low RESET Output to Monitor OutputVoltage
  • Boot-Strap from Output Voltage to ImproveEfficiency
  • Hiccup-Mode Overcurrent and OvertemperatureProtection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17553B evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17553B, a 4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 6V to 60V input and provides a 5V, 50mA output. The EV kit isset up to turn ON at 8V(max) and turn OFF at 6V(max)using EN/UV and HYST pins. The step-down converteris programmed to switch at a 200kHz frequency anddelivers a peak efficiency of 93.6% with suppliedcomponents.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17553B features programmable input EN/UV and HYST threshold, programmable frequency, and an open-drain active-low RESET signal. The device offers built-in hiccup mode protection for overload and short circuit conditions, and thermal shutdown. The EV kit is complaint with CISPR32 class B standard.

Applications

  • Factory Automation
  • Aftermarket Market Automotive
  • General Point of Load

eval board
schematic 3
MAX17553AEVKIT

Evaluation Kit for the MAX17553 (MAX17553A)

Buy Now View Details

Features and Benefits

  • 4.5V to 60V Input-Voltage Range for the Step-Down Converter
  • 3.3V Output Voltage, Up To 50mA Continuous Load Current
  • 91% Peak Efficiency
  • Minimal Number of External Components
  • 150kHz Switching Frequency
  • Resistor Programmable Input Enable-Undervoltage (EN/UV) and Hysteresis (HYST)
  • Internal Loop Compensation
  • 3.2ms (typ) Internal Soft-Start Time
  • Open-Drain Active-Low RESET Output to Monitor Output Voltage
  • Boot-strap from output voltage to Improve Efficiency
  • Hiccup-mode Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17553A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the performance of the MAX17553A, a 4V to 60V, 50mA, Ultra-Small, High Efficiency, Synchronous Step-Down DC-DC Converter in an 8-pin TDFN (2mm x 2mm) package. The EV kit is designed to operate over a 4.5V to 60V input and provides a 3.3V, 50mA output. The EV kit is set up to turn ON at 8V(max) and turn OFF at 4.4V(max) using EN/UV and HYST pins. The step-down converter is programmed to switch at a 150kHz frequency and delivers a peak efficiency of 91% with supplied components.

The EV kit is simple to use and easily configurable with minimal external components. The MAX17553A features programmable input EN/UV and HYST threshold, programmable frequency, and an open-drain active-low RESET signal. The device offers built-in hiccup mode protection for overload and short circuit conditions, and thermal shutdown. The EV kit is complaint with CISPR32 class B standard.

Applications

  • Factory Automation
  • Aftermarket Market Automotive
  • General Point of Load
MAX17553CEVKIT
Evaluation Kit for the MAX17553 (MAX17553C)
MAX17553CEVKIT: Board Photo
MAX17553BEVKIT
Evaluation Kit for the MAX17553 (MAX17553B)
MAX17553BEVKIT: Board Photo
MAX17553AEVKIT
Evaluation Kit for the MAX17553 (MAX17553A)
MAX17553AEVKIT: Board Photo

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